#include<bits/stdc++.h> using namespace std; int main(){ int a,b,c; cin>>a>>b>>c; if(c1){ cout<<a*b; } if(c2){ cout<<a2+b2; } return 0; }

#include <iostream> using namespace std; int main(){ int a,b,c,sum; cin>>a>>b>>c; if (c1) cout<<a*b; if (c2) cout<<(a+b)*2; }

#include <iostream> using namespace std; int main(){ int a,b,c; scanf("%d%d%d",&a,&b,&c); if(c==1) printf("%d\n",ab); else printf("%d\n",2(a+b)); return 0; }

so easy,it’s not so hard.

#include <iostream> using namespace std; int main(){ int a,b,c,sum; cin>>a>>b>>c; if (c == 1){ cout<<a*b; } if (c == 2){ cout<<(a+b)*2; } return 0; }